The thin layer of epithelial tissue in the small intestines works somewhat like a cell membrane. How does its structure relate to its function in the digestive system?

The cell membrane is partially permeable, which controls substances entering the epithelial cells, and hence controlling the type of food molecules that get absorbed into the bloodstream, only allowing small and dissolved food molecules into the bloodstream.

Wind causes waves to form

The offspring will be blood type aa, bb, ab and oo or i